package cn.sjx.modules.nbiot.util;

import cn.hutool.log.Log;
import cn.hutool.log.LogFactory;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * SpringBean 手动注入工具类
 *
 * @Author: sjx
 * @Date: 2019年09月03日 0003 10:11:30
 */
@Component
public class SpringBeanUtil implements ApplicationContextAware {

    private static final Log logger = LogFactory.get();

    /**
     * 上下文对象实例
     */
    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        if (null == SpringBeanUtil.applicationContext) {
            SpringBeanUtil.applicationContext = applicationContext;
        }

        logger.info("");
        logger.info("======================================================");
        logger.info("======> ApplicationContext配置成功，在普通类可以通过调用SpringBeanUtil.getAppContext()获取applicationContext对象");
        logger.info("======> ApplicationContext = {}", SpringBeanUtil.applicationContext);
        logger.info("======================================================");
        logger.info("");
    }

    /**
     * 获取applicationContext
     *
     * @return
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 通过name获取 Bean.
     *
     * @param name
     * @return
     */
    public static Object getBean(String name) {
        return getApplicationContext().getBean(name);
    }

    /**
     * 通过class获取Bean.
     *
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(Class<T> clazz) {
        return getApplicationContext().getBean(clazz);
    }

    /**
     * 通过name,以及Clazz返回指定的Bean
     *
     * @param name
     * @param clazz
     * @param <T>
     * @return
     */
    public static <T> T getBean(String name, Class<T> clazz) {
        return getApplicationContext().getBean(name, clazz);
    }

}